diff --git a/.github/workflows/demo.yml b/.github/workflows/demo.yml
index 187a57e..5d01d6c 100644
--- a/.github/workflows/demo.yml
+++ b/.github/workflows/demo.yml
@@ -140,7 +140,7 @@ jobs:
     - name: Run the demo
       run: |
         source .venv/bin/activate
-        VERBOSE=${{ github.event.inputs.verbose }} PROGRESS=${{ github.event.inputs.progress }} LLVM_REF=${{ github.event.inputs.llvm_ref }} CCACHE=${{ matrix.ccache }} CLONE_DEPTH=${{ github.event.inputs.clone_depth }} BUILD_CONFIG=${{ github.event.inputs.build_config }} IGNORE_ERROR=${{ github.event.inputs.ignore_error }} TEST=${{ github.event.inputs.test }} INSTALL=${{ github.event.inputs.install }} DEPLOY=${{ github.event.inputs.deploy }} EXPORT=${{ github.event.inputs.export }} DEST=/tmp/seal5_llvm ${{ steps.ctx.outputs.program }} examples/${{ github.event.inputs.script }}
+        VERBOSE=${{ github.event.inputs.verbose }} PROGRESS=${{ github.event.inputs.progress }} LLVM_REF=${{ github.event.inputs.llvm_ref }} CCACHE=${{ matrix.ccache }} CLONE_DEPTH=${{ github.event.inputs.clone_depth }} BUILD_CONFIG=${{ github.event.inputs.build_config }} IGNORE_ERROR=${{ github.event.inputs.ignore_error }} TEST=${{ github.event.inputs.test }} INSTALL=${{ github.event.inputs.install }} DEPLOY=${{ github.event.inputs.deploy }} EXPORT=${{ matrix.export }} DEST=/tmp/seal5_llvm ${{ steps.ctx.outputs.program }} examples/${{ github.event.inputs.script }}
     - name: Generate Reports
       run: |
         source .venv/bin/activate
diff --git a/seal5/utils.py b/seal5/utils.py
index 3b83804..bcbf806 100644
--- a/seal5/utils.py
+++ b/seal5/utils.py
@@ -48,6 +48,8 @@ def str2bool(value, allow_none=False):
         return True
     if value in ["false", "off", "no"]:
         return False
+    if len(value) == 0:
+        return False
     assert False, f"Unhandled case: {value}"